Bureau of Mines / Minerals yearbook metals and minerals (except fuels) 1955
Year 1955, Volume I (1958)
Chandler, Henry P.; Tucker, Gertrude E.
Abrasive materials, pp. 121-140
As a work of the United States government, this material is in the public domain.| For information on re-use see: http://digital.library.wisc.edu/1711.dl/Copyright